Hydrocarbon-engine.



G. NYGAARP.

HYDRUUARBON ENGiNE.

,wruunrmu ruin JULY 2M. 1914 Patented Mar. 30, 1913.

HHHHHI ll livntor Witnesses Atlm neys 1 and claimed,

OFFICE.

GUNDER NYGAARD, OF CLERMONT, IOWA.

HYDROCARBON-ENGINE.

Application flied July 20, 191 Serial No. 852.109.

T 0 all ir/wm it may concern:

Be it known that l. (ltisnnn NYGAARD, a citizen of the United States.residing at (.lermont. in the county of Fayette and State of Iowa, haveinvented a new and useful -llydrocarbon-Engine, of which the followingis a specification.

The present invention appertains to hy drocarbon or internal combustionengines, and relates more particularly to the intake and exhause valvesthereof.

t is the object of the present invention to provide a unique valvestructure for a hydrocarbon engine, with a view to obtaining maximumpower with a minimum exi ieruliture of fuel, to cheapcn the manufactureof the engine, to reduce the number of parts to a minimum. and toenable. the parts to be cooled more readily.

\Vit-h the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of constructioi'i hereinafterdescribed it being understood that changes in the precise embodiment ofthe invention herein disclosed, can be made within the scope of what isclaimed, withoutdeparting from the spirit of the invention.

The invention has been illustrated in its preferred embodiment in theaccompanying drawing, herein the figure is a sectional viowof theimproved valve structure as applied to an engine cylinder, parts beingshownin full.

In carrying out the invention. the engine cylinder 1. in which the.piston l reciprora is provided with a domeshaped head or end 3,providing an exhaust chamber therein, and the, exhaust pipe 4 is engagedor so cured through the dome-shaped head 3 to communicate with theexhaust chamber therein. Between the body of the cylinder 1, and thehead 3, there is formed a conracted inner annular valve seat 5, of comparatively large diameter, and in which is seated a puppet valve 6,which forms the exhaust valve. The exhaust valve 6 is secured upon oneend of a tubular stem or shank 7 which is slidable through a centralopening fOI'Il'leCl within the. head 3.

The tubular stem or shank 7 forms a portion of the intake conduit, theouter end portion of the stem or shank 7 being slidably received by thedischarge end of the Specification of Letters rat-cut.

Iatented Mar. 30, 1915.

intake pipe 9, and a packing or stul'ling box 10 being carried by theend of tliepipe 9 and embracing the tubular shank or stem 7 to preventleakage. The end of the intake pipe 9 is concentric or coaxial with theopening 8 of the head 3, in order to properly guide the tubular shank orstem 7 for reciprocatory movement axially of the cylinder 1. The innerend of the. tubular stem or shank i and upon which the exhaust valve 6is so; cured. is flared or formed with a beveled valve seat 11, in whichis seatable a puppet valve 12, forming the intake valve, and having astem 18 projecting axially within the tubular shank T of the exhaustvalve 6, spiders or apeu'tured guides ll being secured within the shank7 and ha 'ing the stem 13 guided slidably therethi'ough. A relativelyweak coiled wire expansion spring 15 is disposed upon the free endportion of the stem 13 and is seated between the spider or guide 1%remote from the valve 12 and an'adjustable nut 16 mounted upon the freeend of the stem 13, whereby the spring 15 will normally hold the intakevalve 12 seated, although the intake valve may open upon the suctionstroke of the piston. v

The cylinder 1 is preferably provided with inner ribs 17 adjacent thevalve seat 5, for properly guiding the exhaust valve 6 for movement toand from its seat- 5, and the ribs 17 are preferably integral with theseat 5, to brace or reinforce the. same.

An annular flange 18 is secured. upon the protruding portion of thetubular shank 7 outside of the head 3, and a coiled Wire expansionspring 19 is disposed upon the shank 7 between the flange 1.8 and thehead 3, to yieldablv seat the exhaust valve 6. The exhaust valve (3 maybe unseated at the 0pportune times, in any suitable manner, and to thisend, a lever 20 may be fulcrumed to an extension .21 of the head 3, andmay have one. arm bear against the flange 18, while the thrust or pushrod 22 may be fulcrumed to the other arm of the lever 20, to enable thesaid lever to be actuated by-the usual valve shaft (notshown).

As will be obvious, the valve structure is operative nohvithstanding thevarious positions in whii h the cylinder 1 may be arranged, the cylinderbeing illustrated in an inverted position in the drawing, although itmay be arranged in various other positions in practice. The usual spark"plug or igniter 23 is engaged through the cylinder 1 adjacent the valveseat 5, so as to lie between the exhaust valve 6 and the piston 2.

In operation, the exhaust and intake valves 6 and 12, respectively, willnormally be held seated under the influence of the respective springs 19andv 15, and when the piston 2 moves through its intake stroke, thesuction created w'ithinthe e inder will unseat the intake valve 12, andthe combustible mixture will then be sucked into the cylinder from theintake pipe 9 through the tubular shank 7 of the exhaust valve 6.Immediately upon thepiston 2 reaching theend of the suction stroke, theintake valve 12 will be seated under the influence of the spring 15, andboth of the valves 6 and 12 will remain seated during the compressionstroke of the piston 2, it being-observed that the present engine has afour cycle action. The compressed gas is then ignited by the spark plug23, as usual, 0 force the piston 2 through its power or explosionstroke, and then, when the piston 2 returns through its exhaust stroke,the exhaust valve 6 is unseated to enable the burnt gases to pass intothe discharge chamber within the domeshaped head 3 and thence to theatmosphere through the exhaust pipe 4. The exhaust valve 6 may bereadily unseated by the timely oscillation of the lever 20, which may beaccomplished in any suitable mode, whereby the lever 20 bearing againstthe flange 18 will slide the tubular shank 7 inwardly against thetension of the spring 19, to unseat the exhaust valve 6, for the purposeindicated. It is to be noted that the intake valve 12 is movable withthe exhaust valve 6, since the exhaust valve carries the seat of theintake valve, but in view of the aimed at in a satisfactory manner, andfurthermore, it will be noted that the tubular shank 7 of the exhaustvalve 6, passing through the discharge chamber within the head 3, willenable the shank 7 to be heated so as to heat the fresh gas entering thecylinder, to increase the efliciency of the engine.

Having thus described the invention, what is claimed as new is In anengine, a cylinder having a chambored head at one end and an innercontracted valve seat between the said head and the body of thecylinder, a spring pressed tubular shank slidable through the said head,an exhaust valve carried by the said shall and cooperable with the saidvalve seat, said shank having a valve seat, a yieldably seated intakevalve cooperable with the last mentioned valve seat and carried by thesaid shank, and means for moving the said shank inwardly to unseat theexhaust valve, there being ribs between the body of the cylinder andfirst mentioned valve seat forming guides for the exhaust valve.

In testimony that I claim the foregoing as my own, I have hereto afiixedmy signature in the presence of two witnesses.

GUNDER NYGAARD. Witnesses:

B. C. GRUvEn, E. M. HAUG.

